that is what has officials like defense secretarge concerned. >> we expect other nations to respect ukraine's sovereignty and avoid provocative actions. that's why i'm closely watching russia's military exercises along the ukrainian border. >> reporter: the u.s. is also trying to avoid provocative actions. today, the top american general in europe said the nato alliance is not making any plans to respond to a russian intervention in ukraine. norah. >> o'donnell: all right, david martin, thank you. tonight, extreme weather is impacting people in much of the nation. rain finally fell in drought-devastated california but a new storm threatens to trigger mupped slides and flooding. in the midwest, the cold is intensifying. in minnesota it proved deadly. jamie yuccas of cbs station wcco, is in minneapolis. jamie. >> reporter: norah, it is the 46th day this winter below zero here in minneapolis, making it the coldest winter in 35 years. parts of minnesota looked and felt like the arctic today. police investigating the death of a six-year-old girl in bemidji, said she showed signs of exposure. it's